pg_last_xact_replay_timestamp clarification

The attached, applied patch documents that the timestamp returned by
pg_last_xact_replay_timestamp is the time on the _primary_ that the
transaction was generated.

--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ It's impossible for everything to be true. +